Charging door for leers



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E. E. NHLNER CHARGING DOOR FOR LEERS Filed March 18 1921 2 Sheets-Sheet l Feb, 31 $24.

E. E. MILNER CHARGING noon FOR LEERS 2 Sheets-Sheet 2 Filed March 18. 1921 INVENTOR- l. &Mm

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EDWIN E. MILNER, OF SCOTT TOWNSHIP, ALLEGHENY COUNTY, PENNSYLVANIA, AS SIGNOR TO H. L. DIXON COMPANY, OF CARNEGIE, PENNSYLVANIA, A CORPORA- TION OF PENNSYLVANIA.

CHARGING DOOR FOR LEERS.

Application filed March 18, 1921.

To all whom it may concern:

Be it known that I, EDWIN E. MILNER, a citizen of the United States, residing in Scott Township, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Charging Doors for Leers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in

which Figure 1 is a vertical longitudinal section of a portion of a leer embodying my invention;

Figure 2 is a front elevation of the same, partly broken away; and

Figure 3 is a longitudinal vertical section showing the door, the adjacent parts, and the actuating treadle therefor.

My invention has relation to charging doors for leers, and is particularly adaptable to leers used for annealing glass articles, although it may be applied to leers for other purposes.

charging ends of annealing leers have not been satisfactory. It has been necessary to open substantially the entire end of the leer with each charging operation, thereby admitting suflicient volumes of outside air to materially affect the temperature within the leer chamber. Furthermore, these doors as usually constructed have a tendency to warp so that they do not close and operate properly.

My invention is designed to provide a door which will obviate these objections, and which ,will be simple and convenient in its operations.

Referring in which I have shown a preferred embo iment of my invention, the numeral 2 designates the front end portion of the annealing leer, which maybe, in general, of

any usual or suitable construction. 3 indicates the usual leer conveyor, and 4 one of the carrying wheels therefor.

In accordance with my invention, I provide the charging opening of the leer with a door formed in as many sections as may be necessary or desirable, depending upon.

the width of the leer. Preferably each of these sections is relatively narrow so that when opened it will admit a limited quan- The doors heretofore employed at the to the accompanying drawin s,

Serial No. 453,465.

tity of outside air to the interior of the furnace. As shown in the accompanying drawings, each of the door sections consists of a plate 5 of sheet metal, which is pivoted at 6, with a counterweighted portion 7 below its pivot. The counterweight is so proportioned that the doors will normally be held in the inclined closed position shown in Figures 1 and 2 in full lines, but may be very easily depressed into the open position shown in dotted lines in said figures. The doors are arranged to close upwardly and outwardly against the inclined frame members 8, which'are spaced from each other a distance substantially equal to the width of the individual door sections. The frame members 8 are securedto the frame of the leer in any suitable manner.

In charging the leer with many classes of glassware, the doors can be opened by simply pressing the 'charging forks against the doors as the glassware is inserted into .the furnace. As soon as the charging fork is withdrawn, the counterweight will return the door section to its closed position. In charging lighter ware, however, it is desirable to provide means whereby the door may be independently opened to admit the ware. For this purpose I have provided a foot treadle 9 connected by a link 10 with a lever 11 having a pin and slot connection 12 with the counterweighted end of the door section. One of these treadles and these connections are provided for each door section.

The advantages of my invention will be readily apparent to those familiar with the operation of annealing leers, since it provides a charging door construction which will be largely free from the objections heretofore experienced in the operation of such leers.

I do not wish to limit myself to the particular construction and arrangement which I have herein shown and described, as it is obvious that various changes can be made without departing from the spirit and scope of the invention as defined in the appended claims. Thus the construction of the doors may be changed, and difierent means may be provided for counterweighting them and for positively opening them.

I claim:

1. An annealing leer having a plurality of charging doors arranged side by side, and

foot operated means whereby said doors may be separately opened and closed, substantially as described.

2. An annealin leer having an inclined door frame, and a plurality of pivoted charging doors arranged side by side in said frame, each of said doors being counterweighted to substantially balance the door but .to hold it in a normally closed position against said inclined frame, substantially as described.

3. An annealing leer having a plurality of pivoted charging doors arranged side by side, each of said doors being counterweighted to substantially balance the door but to hold it in a normally closed position, to

gether with separate foot operated actuatmg. means for opening each door, substantially as described.

4. An annealing leer having a charging opening, inclined frame members arranged across such opening and spaced transversely from each other, and a charging door pivotally mounted .between each pair of said frame members and arranged to close upwardly and -'outwardly against said members, each of said doors having a'counterweight substantially balancing" the door but arranged to normally hold it in closed position, substantially as described.

5."An annealing leer having a charging opening, inclined frame members arranged across suchopening and spaced transversely from each other, a charging door pivotally mounted between each pair of said frame members and arranged to close upwardly and outwardly against said members, each said doors having a counterweight substantially balancing the door but arranged to normall hold it in closed position, together with separate actuating means for opening each of said doors, substantially as described;

6. An annealing leer having a charging door comprising a plurality of inclined sections, and a counterweight for each of said sections extending in the plane of the door, substantially as described.

7 An annealing leer having a plurality of charging doors arranged side b side, said doors being sufliciently upwardly and inyvardly inclmed'to open inwardly wardly under pressure exerted downwardly thereon, and each of said doors having a counterweight extending in the plane thereof, substantially as described.

8. In an annealing leer having a door opening, a pivotally opening, and a counterweight for said door extendingbelow the pivotal mounting therefor and lying in the plane of the door, sub stantially as described.

In testimony whereof, I have hereunto set my hand.

EDWIN E. MILNER.

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